Here is a list of some things they should have a look at:
aa-range: pretty much the loweest of all mages
Soul Shackles delay/tether range/damage: lowest thether range and longest trigger delay of all mages. Her ultimate damage is very lackluster considering how difficult it is to pull off. Bugfix: can stun Enemies after they use flash (It might have something to do with the .25 update rate)
Tormented Soil: small adjustment to the damage values. Sometimes caster minions do survive with like 3hp or something at lv3(skill level). Also the changes done to Tormented Soil and Soul Siphon in 7.24 feel really weird still. I think there is a better way to do it.
Mana costs: insane... trading is pretty much impossible without
.
Her recommended build path for mid suggest to buy
still...
Important: This doesn´t mean all of the things mentioned above need to be adjusted.
Suggestion for a mini update: A bit more focus on her autoattacks. Something like if enemies are affected by her abilities she can trigger Soul Siphon with her aa. Similar to the thing Swain does but instead of pulling them towards morgana she does extra damage or has increased range and regenerates life/mana.